Berlin 2005 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 11: Light induced phenomena II

CPP 11.1: Talk

Monday, March 7, 2005, 11:15–11:30, TU C230

Direct Burning of Laser-Resonant Persistent Antiholes in the UV Absorption Spectrum of Anisole — •Mark Somoza and Josef Friedrich — Lehrstuhl für Physik Weihenstephan, TU München, 85350 Freising

Laser-induced persistent spectral antiholes have been observed in a small range of the uv absorption spectrum of anisole. The sample is anisole frozen at low concentrations into a cyclohexane host matrix. The observed antiholes are narrow lines (250 MHz) corresponding to increases absorption at the exact frequency of the laser irradiation and are permanent below 10K. Outside the region where antiholes were observed, neither holes nor antiholes could be created, even with high laser power. The mechanism behind this highly unusual phenomena may be a photoinduced configurationally change of the anisole within the host site.